thermal: meaning, definition, pronunciation and examples
B2Neutral to Technical
Quick answer
What does “thermal” mean?
Relating to heat or temperature.
Audio
Pronunciation
Definition
Meaning and Definition
Relating to heat or temperature.
1. Designed to retain body heat (thermal clothing). 2. A rising current of warm air, used by gliders and birds. 3. Pertaining to the Earth's internal heat (thermal energy).
Dialectal Variation
British vs American Usage
Differences
Minimal. Both varieties use all senses identically. Spelling is identical.
Connotations
Identical. Slightly technical connotation for the 'heat' sense, but 'thermal clothing' is entirely everyday.
Frequency
Equally common in both varieties.
Grammar
How to Use “thermal” in a Sentence
thermal + N (thermal imaging)N + thermal (spring thermal)be + thermal (The water is thermal.)Vocabulary
Collocations
Examples
Examples of “thermal” in a Sentence
verb
British English
- The pilot tried to thermal for another twenty minutes to gain height.
American English
- The eagle thermalled effortlessly above the canyon.
adverb
British English
- (Rare/Non-standard)
American English
- (Rare/Non-standard)
Usage
Meaning in Context
Business
In product marketing for clothing or building materials (e.g., 'Our new line of thermal base layers').
Academic
Common in physics, engineering, geology, and environmental science texts (e.g., 'thermal properties of the material').
Everyday
Primarily for clothing and weather (e.g., 'Don't forget your thermals; it's freezing outside!').
Technical
Precise use in thermodynamics, aeronautics, materials science (e.g., 'thermal decomposition', 'riding a thermal').
Watch out
Common Mistakes When Using “thermal”
- Using 'thermal' as a direct synonym for 'hot' (e.g., 'The soup is thermal.'). Confusing 'thermal' (adj) with 'thermos' (n).
FAQ
Frequently Asked Questions
Primarily yes, but its applications (clothing, air currents, energy) are extensions of the core 'heat' meaning.
Yes, but it's specialist. In gliding and ornithology, it means 'to rise on a thermal updraft'.
They are largely synonymous, but 'thermal' is far more common in everyday and technical use. 'Thermic' is more restricted to scientific compounds (e.g., thermic lance).
Because it is designed to retain body heat (thermal energy) through insulation.
Relating to heat or temperature.
Thermal is usually neutral to technical in register.
Thermal: in British English it is pronounced /ˈθɜː.məl/, and in American English it is pronounced /ˈθɝː.məl/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “(catch) a thermal (aviation/gliding slang)”
Learning
Memory Aids
Mnemonic
Think of a THERMometer measuring heat; THERMal is all about heat.
Conceptual Metaphor
HEAT IS A FLUID/RESOURCE (e.g., thermal flow, thermal store).
Practice
Quiz
In which context would the word 'thermal' LEAST likely be used?